時間：2023-02-09 06:27:01 | 來源：建站知識
時間：2023-02-09 06:27:01 來源：建站知識
一.實(shí)現(xiàn)重定向
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1void sendRedirect(String var1) throws IOException;2.新建一個類，類名為：Redirectservlet。1protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {2 resp.sendRedirect("/Response/img");3}5.注冊url，添加映射：1 <servlet>2 <servlet-name>Redirect</servlet-name>3 <servlet-class>com.gowork.servlet.Redirectservlet</servlet-class>4 </servlet>5 <servlet-mapping>6 <servlet-name>Redirect</servlet-name>7 <url-pattern>/red</url-pattern>8 </servlet-mapping>6.啟動項(xiàng)目，訪問localhost:8080/Response/red。1public class requesttext extends HttpServlet {2 @Override3 protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {4 System.out.println("現(xiàn)在已經(jīng)進(jìn)入這個請求了！");5 }6}如果我們進(jìn)入過這個重定向頁面就會輸出：現(xiàn)在已經(jīng)進(jìn)入這個請求了。1<servlet>2 <servlet-name>newRedirect</servlet-name>3 <servlet-class>com.gowork.servlet.requesttext</servlet-class>4</servlet>5<servlet-mapping>6 <servlet-name>newRedirect</servlet-name>7 <url-pattern>/loign</url-pattern>8</servlet-mapping>如果我們訪問/rednew，就會向后端的com.gowork.servlet.requesttext發(fā)出請求。1<!-- https://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->2<dependency>3 <groupId>javax.servlet.jsp</groupId>4 <artifactId>jsp-api</artifactId>5 <version>2.2.1-b03</version>6 <scope>provided</scope>7</dependency>我們進(jìn)入pom.xml，導(dǎo)入上面的jsp。1String name =req.getParameter("username");2String pass =req.getParameter("password");34System.out.println(name+":"+pass);56resp.sendRedirect("");重定向要注意路徑問題，否則容易404問題。關(guān)鍵詞：原理,運(yùn)用,實(shí)戰(zhàn)
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